This has taken me about two years to figure out. I hope it helps you too. Eliminate the food additive Carrageenan from your diet. I was having weakness, muscles spasms and pain which were growing progressively worse. It took me some years to realize two things exacerbated my problems. Ice Cream and toothpaste. Both of these things have a common ingredient, Carrageenan. I had changed my toothpaste to Colgate about two years ago. Prior to that I had always used regular Crest which does not have Carrageenan in it. After eliminating Carrageenan from my diet my energy returned fully. AND no more muscles spasms and pain. It's been a miracle for me! Carrageenan is in a LOT of foods. It is there to make foods more creamy. It is in yogurt, ice cream, sour cream, toothpastes, packaged deli meats, a million processed foods. You just have to check the labels on everything! I've found it can also be a hidden ingredients. Condensed milk, cream and half and half may have it without listing it. It is used in vinegar as a clarifyer. I have also eliminated all foods with vinegar in them. After I figured this all out, I looked up Carrageenan on the internet. There are sites out there that talk about the Carrageenan problem. I was so surprised! I admit, changing my diet that drastically has been hard, but well worth the trouble. I feel great ! If you do nothing else, change your toothpaste to one that does not have this ingredient. Give it a try! If it works for you, please post a response so others will know about it. Good Luck! D.